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  1. Home
  2. Discontinued Car Audio & Electronics
  3. Discontinued Car Amplifiers
  4. Discontinued 4-Channel Amplifiers

Discontinued 4-Channel Amplifiers

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Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
Amplifier Key Features
Amplifiers can offer a diverse array of features. If you select more than one feature, then you will view amplifiers that have ALL features selected. These include speaker-level inputs that facilitate seamless integration with factory audio systems, Bluetooth connectivity suitable for ATV/UTV or Classic vehicle setups, built-in DSPs that provide enhanced control over your audio signal, and a host of other functionalities to explore.
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
Zeus Series (30)
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Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Remote bass/level controller
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
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Boss CH800

1600W Max, Chaos Series 4-Channel Amplifier (CH-800)

CH800 big DISCONTINUED
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Boss CH800

1600W Max, Chaos Series 4-Channel Amplifier (CH-800)

1600 watts Max, Class A/B 4-Channel Amplifier • 150 watts RMS x 4 chan. @ 4 ohm • 4 ohm Bridged: 800 watts Max x 2 chan. • MOSFET Power Supply • Tri-Mode Capable • Heavy-duty Aluminum Alloy Heatsink • High Pass, Full, and Low Pass Crossover • Soft Turn-on Circuit • Thermal and Speaker Short Protection

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1600 watts Max, Class A/B 4-Channel Amplifier • 150 watts RMS x 4 chan. @ 4 ohm • 4 ohm Bridged: 800 watts Max x 2 chan. • MOSFET Power Supply • Tri-Mode Capable • Heavy-duty Aluminum Alloy Heatsink • High Pass, Full, and Low Pass Crossover • Soft Turn-on Circuit • Thermal and Speaker Short Protection

Hifonics XXV-Gemini

4-Channel XXV Series Amplifier (XXVGemini)

XXV-Gemini big DISCONTINUED
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Hifonics XXV-Gemini

4-Channel XXV Series Amplifier (XXVGemini)

XXV Series 4-Channel Class AB Car Amplifier • 125W x 4 chan. @ 4 ohm • 200W x 4 chan. @ 2 ohm • 400W x 2 chan. @ 4 ohm • 800W x 2 chan. Max • MOSFET power supply • 4/3/2 channel operation

XXV Series 4-Channel Class AB Car Amplifier • 125W x 4 chan. @ 4 ohm • 200W x 4 chan. @ 2 ohm • 400W x 2 chan. @ 4 ohm • 800W x 2 chan. Max • MOSFET power supply • 4/3/2 channel operation

Boss CH1000

2000W Max, Chaos Series 4-Channel Amplifier (CH-1000)

CH1000 big DISCONTINUED
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Boss CH1000

2000W Max, Chaos Series 4-Channel Amplifier (CH-1000)

2000 watts Max, Class A/B 4-Channel Amplifier • 200 watts RMS x 4 chan. @ 4 ohm • 4 ohm Bridged: 1000 watts Max x 2 chan. • MOSFET Power Supply • Tri-Mode Capable • Heavy-duty Aluminum Alloy Heatsink • High Pass, Full, and Low Pass Crossover • Soft Turn-on Circuit • Thermal and Speaker Short Protection

2000 watts Max, Class A/B 4-Channel Amplifier • 200 watts RMS x 4 chan. @ 4 ohm • 4 ohm Bridged: 1000 watts Max x 2 chan. • MOSFET Power Supply • Tri-Mode Capable • Heavy-duty Aluminum Alloy Heatsink • High Pass, Full, and Low Pass Crossover • Soft Turn-on Circuit • Thermal and Speaker Short Protection

Focal FPP4100

480W RMS, 4-Channel Power Performance Series Class A/B Car Amplifier

FPP4100 big DISCONTINUED
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Focal FPP4100

480W RMS, 4-Channel Power Performance Series Class A/B Car Amplifier

4-Channel Power Performance Series Class A/B Car Amplifier • 4 ohm: 75 watts x 4 chan. • 2 ohm: 140 watts x 4 chan. • Bridged, 4 ohm: 240 watts x 2 chan. • Variable Bass Boost (0 to +9 dB bass boost at 50 Hz)

4-Channel Power Performance Series Class A/B Car Amplifier • 4 ohm: 75 watts x 4 chan. • 2 ohm: 140 watts x 4 chan. • Bridged, 4 ohm: 240 watts x 2 chan. • Variable Bass Boost (0 to +9 dB bass boost at 50 Hz)

MB Quart ONX4.80 (Factory Refurbished)

4-Channel ONYX Series Car Amplifier (ONX-4.80)

ONX4.80 big DISCONTINUED
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MB Quart ONX4.80 (Factory Refurbished)

4-Channel ONYX Series Car Amplifier (ONX-4.80)

ONYX Series 4-Channel Class A/B Car Amplifier • 160W x 4 Chan @ 2 Ohm • 80W x 4 Chan @ 4 Ohm • Unbalanced RCA Input Jack • Preamp RCA Outputs • 4-Way System Protection Circuitry • Piano Black Gloss Finish

ONYX Series 4-Channel Class A/B Car Amplifier • 160W x 4 Chan @ 2 Ohm • 80W x 4 Chan @ 4 Ohm • Unbalanced RCA Input Jack • Preamp RCA Outputs • 4-Way System Protection Circuitry • Piano Black Gloss Finish

Crunch P1-1650.4 (Factory Refurbished)

1600W Max 4-Channel Power One Series Class AB Car Amplifier

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Crunch P1-1650.4 (Factory Refurbished)

1600W Max 4-Channel Power One Series Class AB Car Amplifier

• 4 ohm: 200 watts x 4-Chan.
• 2 ohm: 400 watts x 4-Chan.
• Bridged, 4 ohm: 800 watts x 2 chan.
• SEPP Class A/B Analog Amplifier
• Selectable crossover modes: FULL / LPF / HPF
• Signal to Noise Ration: >90 dB
• Total Harmonic Distortion (THD): <0.05%

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• 4 ohm: 200 watts x 4-Chan.
• 2 ohm: 400 watts x 4-Chan.
• Bridged, 4 ohm: 800 watts x 2 chan.
• SEPP Class A/B Analog Amplifier
• Selectable crossover modes: FULL / LPF / HPF
• Signal to Noise Ration: >90 dB
• Total Harmonic Distortion (THD): <0.05%

Crunch PZA900.4

900W 4-Channel Power Zone Series Car Amplifier

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Crunch PZA900.4

900W 4-Channel Power Zone Series Car Amplifier

4-Channel Power Zone Series Amplifier • Bass Boost (0-12 dB @ 45Hz) • Preamp RCA Outputs • 4-Way System Protection Circuitry • Heavy Duty Aluminum Alloy Heatsink • Fully Adjustable 12 dB Crossover • Nickle-Plated RCA Level Inputs

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4-Channel Power Zone Series Amplifier • Bass Boost (0-12 dB @ 45Hz) • Preamp RCA Outputs • 4-Way System Protection Circuitry • Heavy Duty Aluminum Alloy Heatsink • Fully Adjustable 12 dB Crossover • Nickle-Plated RCA Level Inputs

Rockford Fosgate Punch PBR300X4 OPEN BOX INCOMPLETE

300 Watts Punch Series Boosted Rail Compact 4-Channel Amplifier

PBR300X4 big DISCONTINUED
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Rockford Fosgate Punch PBR300X4 OPEN BOX INCOMPLETE

300 Watts Punch Series Boosted Rail Compact 4-Channel Amplifier

Previously installed, used and wires cut
• RMS 75 x 1 @ 4 ohm
• Features Rockford Fosgate's Class-BR Topology
• CEA-2006 Compliant
• Ultra Compact Chassis
• Boosted Rail Design
• Dimensions: 6.75"L x 4.25"W x 1.53"H

Previously installed, used and wires cut
• RMS 75 x 1 @ 4 ohm
• Features Rockford Fosgate's Class-BR Topology
• CEA-2006 Compliant
• Ultra Compact Chassis
• Boosted Rail Design
• Dimensions: 6.75"L x 4.25"W x 1.53"H

SPL FX4-1200 R/B

1200W Max, FX Series 4-Channel Amplifier

FX4-1200 big DISCONTINUED
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SPL FX4-1200 R/B

1200W Max, FX Series 4-Channel Amplifier

•1200W Max, FX Series 4-Channel Amplifier • 4 ohm: 100 watts x 4 chan • 2 ohm: 125 watts x 4 chan. • S/N Ratio: 98dB • THD: 0.02%

•1200W Max, FX Series 4-Channel Amplifier • 4 ohm: 100 watts x 4 chan • 2 ohm: 125 watts x 4 chan. • S/N Ratio: 98dB • THD: 0.02%

Alpine MRP-F600

600W RMS, 4-Channel Amplifier

MRP-F600 big DISCONTINUED
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Alpine MRP-F600

600W RMS, 4-Channel Amplifier

V Power Series 4-Channel Class AB Car Amplifier • 100W x 4 chan. @ 4 ohm • 150W x 4 chan. @ 2 ohm • 300W x 2 chan. @ 4 ohm • 300W x 4 chan. Max approx. • 4/3/2 channel operation • Non-fading preamp RCA outputs

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V Power Series 4-Channel Class AB Car Amplifier • 100W x 4 chan. @ 4 ohm • 150W x 4 chan. @ 2 ohm • 300W x 2 chan. @ 4 ohm • 300W x 4 chan. Max approx. • 4/3/2 channel operation • Non-fading preamp RCA outputs

Infinity Reference 704A Open Box (Complete)

1000W Peak (400W RMS) Reference Series 4-Channel Amplifier

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Infinity Reference 704A Open Box (Complete)

1000W Peak (400W RMS) Reference Series 4-Channel Amplifier

• 70 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 1000 Watts
• Variable Bass Boost: 0 to +9 dB
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 32 - 320 Hz

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• 70 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 1000 Watts
• Variable Bass Boost: 0 to +9 dB
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Frequency Response: 32 - 320 Hz

Blaupunkt GTA480

210W Max, GTA Series Class AB 4-Channel Amplifier

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Blaupunkt GTA480

210W Max, GTA Series Class AB 4-Channel Amplifier

GTA Series 4-Channel Class AB Car Amplifier • 75W x 4 chan. @ 4 ohm • 105W x 4 chan. @ 2 ohm • 210W x 4 chan. Max • Direct AUX input • Speaker-level inputs • Preamp RCA outputs

GTA Series 4-Channel Class AB Car Amplifier • 75W x 4 chan. @ 4 ohm • 105W x 4 chan. @ 2 ohm • 210W x 4 chan. Max • Direct AUX input • Speaker-level inputs • Preamp RCA outputs

Focal FPS 4.160

800W 4-Channel Class AB FPS Series Amplifier

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Focal FPS 4.160

800W 4-Channel Class AB FPS Series Amplifier

4-Channel Class AB FPS Series Amplifier • Unique Circuit Designed Dual Power Supply • Dynamic Soft Clipping • 5-Way System Protection Circuitry • Thermostat Controlled, Progressive-Speed Cooling Fan

4-Channel Class AB FPS Series Amplifier • Unique Circuit Designed Dual Power Supply • Dynamic Soft Clipping • 5-Way System Protection Circuitry • Thermostat Controlled, Progressive-Speed Cooling Fan

Soundstream STL4.320 R/B

320W RMS, 4-Channel Stealth Series Amplifier

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Soundstream STL4.320 R/B

320W RMS, 4-Channel Stealth Series Amplifier

Stealth Series 4-Channel Class AB Car Amplifier • 50W RMS x 4 Chan. @ 4 ohm • 80W RMS x 4 Chan. @ 2 ohm • 320 Watts Max • Selectable Bass Boost • 4/3/2 Channel Operation • Black Anodized Finish with Chrome Accents

Stealth Series 4-Channel Class AB Car Amplifier • 50W RMS x 4 Chan. @ 4 ohm • 80W RMS x 4 Chan. @ 2 ohm • 320 Watts Max • Selectable Bass Boost • 4/3/2 Channel Operation • Black Anodized Finish with Chrome Accents

Hifonics ZXi 8006

740W RMS, Zeus ZXi 5-Channel Amplifier ZXi8006

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Hifonics ZXi 8006

740W RMS, Zeus ZXi 5-Channel Amplifier ZXi8006

5-channel, complete system amplifier • Hifonics New Illuminated Heat-Sink • 740 watts total RMS power • 300W RMS sub ch • 110W RMS x 4 ch @ 2 ohm

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5-channel, complete system amplifier • Hifonics New Illuminated Heat-Sink • 740 watts total RMS power • 300W RMS sub ch • 110W RMS x 4 ch @ 2 ohm

Focal Solid 4 Red

Focal Solid Series Class AB 4-Channel Amplifier (Red)

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Focal Solid 4 Red

Focal Solid Series Class AB 4-Channel Amplifier (Red)

Solid Series 4-Channel Class A/B Car Amplifier • 100W x 4 Chan @ 2 Ohm • 75W x 4 Chan @ 4 Ohm • 4-Way System Protection Circuitry • Speaker-Level Inputs with Signal Sensing • Pseudo-Balanced RCA Input • Gold-Plated Terminals

Solid Series 4-Channel Class A/B Car Amplifier • 100W x 4 Chan @ 2 Ohm • 75W x 4 Chan @ 4 Ohm • 4-Way System Protection Circuitry • Speaker-Level Inputs with Signal Sensing • Pseudo-Balanced RCA Input • Gold-Plated Terminals

DS18 S-1500.4D/RD

1500W RMS 4-Channel S Series RED Full Range Class D Amplifier

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DS18 S-1500.4D/RD

1500W RMS 4-Channel S Series RED Full Range Class D Amplifier

• 90 watts x 4 channel @ 4 ohm
• 130 watts x 4 channel @ 2 ohm
• Bridged: 235 watts x 2 channel @ 4 ohm
• Total RMS Power: 1500 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

• 90 watts x 4 channel @ 4 ohm
• 130 watts x 4 channel @ 2 ohm
• Bridged: 235 watts x 2 channel @ 4 ohm
• Total RMS Power: 1500 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

Audiobahn A4004V

800W Max, Intake Series 4-Channel Amplifier

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Audiobahn A4004V

800W Max, Intake Series 4-Channel Amplifier

Intake Series 4-Channel Amplifier • 100W x 4 chan. @ 2 Ohm • 200W x 2 chan. @ 4 Ohm bridged • preamp outputs • cooling fan • MOSFET power supply • built-in digital voltmeter

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Intake Series 4-Channel Amplifier • 100W x 4 chan. @ 2 Ohm • 200W x 2 chan. @ 4 Ohm bridged • preamp outputs • cooling fan • MOSFET power supply • built-in digital voltmeter

NVX MVPA4 (Like New)

Micro-V Series 800 Watt (400W RMS) 4-Channel Bridgeable Micro Class D Compact Car Amplifier (MVPA.4)

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NVX MVPA4 (Like New)

Micro-V Series 800 Watt (400W RMS) 4-Channel Bridgeable Micro Class D Compact Car Amplifier (MVPA.4)

• The size of a postcard with 400 Watts True RMS Output!
• • MVP Series 4-Channel Micro Class D Amplifier
• 50W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 8 Gauge Power and Ground Inputs
• Extremely Small Footprint!

• The size of a postcard with 400 Watts True RMS Output!
• • MVP Series 4-Channel Micro Class D Amplifier
• 50W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 8 Gauge Power and Ground Inputs
• Extremely Small Footprint!

Clif Designs CD4.4LE

LE Series 4-Channel Amplifier

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Clif Designs CD4.4LE

LE Series 4-Channel Amplifier

• 800 Watt Class-AB 2-ChannelAmplifier • 80 watts x 4 chan. @ 4 ohm • 110 watts x 4 chan. @ 2 ohm • Peak Power Output: 800 watts x 2 chan. @ 4 ohm • High- and Low-Level Inputs • Signal to Noise Ratio: 95 dB • Dimensions: 13" L x 9.05" W x 2.16" H • 3-year Authorized Manufacturer's warranty

• 800 Watt Class-AB 2-ChannelAmplifier • 80 watts x 4 chan. @ 4 ohm • 110 watts x 4 chan. @ 2 ohm • Peak Power Output: 800 watts x 2 chan. @ 4 ohm • High- and Low-Level Inputs • Signal to Noise Ratio: 95 dB • Dimensions: 13" L x 9.05" W x 2.16" H • 3-year Authorized Manufacturer's warranty

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    FAQ Frequently asked questions in Discontinued 4-Channel Amplifiers

    4 Channel Amplifiers Frequently Asked Questions (FAQ)
    A 4-channel amplifier is a type of car audio amplifier that features four separate channels, each capable of powering a speaker or a pair of speakers. By distributing power across four channels, you can connect your front and rear speakers to the amplifier, significantly enhancing the overall sound quality and clarity in your car audio system. With a 4-channel amplifier, you can achieve a balanced soundstage, where the music seems to come from different directions, providing an immersive listening experience. Additionally, these amplifiers often come with adjustable crossovers and gain controls, allowing you to fine-tune the audio output for each set of speakers, optimizing the sound reproduction according to your preferences.
    Yes, many 4-channel amplifiers are bridgeable, allowing you to combine two channels to power a single speaker or subwoofer with higher output power. This bridging capability is useful if you have a pair of high-powered front speakers or a powerful subwoofer that requires more power than a single channel can provide. However, it's essential to check the amplifier's specifications and instructions to confirm its bridgeability and the recommended bridging configurations. Not all 4-channel amplifiers support bridging, and improper bridging can damage the amplifier or connected speakers. If you are unsure about bridging your 4-channel amplifier, consult the amplifier's manual or reach out to Sonic Electronix customer support for expert assistance.
    To select the right 4-channel amplifier for your speakers, consider their power handling capabilities and impedance. First, identify the RMS power rating of your front and rear speakers. The amplifier's RMS power output per channel should match or slightly exceed the RMS power rating of your speakers to ensure optimal performance without distortion. Next, check the impedance (measured in ohms) of your speakers, as well as the amplifier's minimum and maximum impedance ratings. Match the speaker impedance with the appropriate amplifier channels to prevent compatibility issues. For example, if your speakers have an impedance of 4 ohms, make sure the amplifier channels for those speakers can handle a 4-ohm load. Paying attention to these specifications ensures a seamless integration of your speakers with the 4-channel amplifier.
    Yes, a 4-channel amplifier can be used to power additional speakers, such as tweeters or coaxial speakers, in your car audio system. Beyond the front and rear speakers, a 4-channel amplifier has the flexibility to accommodate additional speaker types, provided that the total load impedance and power requirements of the amplifier's channels are within its specifications. For example, if your 4-channel amplifier has two unused channels, you can use them to power additional speakers for improved sound coverage and audio performance. Be cautious not to overload the amplifier, and ensure that the speakers' impedance and power handling align with the available channels to avoid damaging the amplifier or speakers. If you have questions about expanding your audio system with a 4-channel amplifier, seek expert advice from Sonic Electronix.
    A proper and safe installation of a 4-channel amplifier is essential for optimal performance and to prevent any electrical or mechanical issues. To ensure a successful installation, start by reading the amplifier's user manual thoroughly, as it contains specific instructions and guidelines for installation. Follow all safety precautions and use the appropriate wiring and connectors rated for the amplifier's power output. Securely mount the amplifier in a well-ventilated area, away from heat sources, and avoid placing it on carpeted surfaces. Route and secure all cables carefully to avoid interference and potential hazards. Double-check all connections to ensure they are tight and secure. If you are not confident in installing the amplifier yourself, consider seeking professional installation services to ensure a safe and expertly done installation that optimizes the performance of your 4-channel amplifier and car audio system.
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